Reflector for incandescent lamps.



' Patented 0ctf3, 1899' W. GUDDCHILD. REFLECTOR FDR INDANDESCENT LAMPS.

(Application filed 1, 1899.) (N9 Model.)

\W J M Owe/QM UNITED STATES PATENT FFICE.

REFLECTOR FOR INCANDESCENT LAMPS.

SPECIFICATION forming part of Letters Patent No. 634,295, dated October3, 1899.

Application filed February 11,1899. Serial No. 705,270. (No model.)

T0 ctZZ whom it may (oncern:

Be it known that I, WALTER GOODCHILD, a

citizen of the United States, residing at Wyoming, Essex county, NewJersey, have invented certain new and useful Improvements in Reflectorsfor Incandescent Lamps, of which the following is a specification.

This invention relates to reflectors used in connection with the bulbsof incandescent electric lights. Among the various forms of reflectorsfor this class of lamps one is provided by silveringthe upper part ofthe bulb down to a point near the largest diameter of the same, leavingthe lower portion of the bulb clear all around. Another construction,which is designed, mainly, for a shade, incloses the upper half of thebulb all around with a shade of colored glass, which is afterward unitedintegrally with the glass of the bulb by heat. These devices performtheir functions, but being integral with or inseparably connected withthe bulb are necessarily discarded with the bulb when the filament ofthe latter is burned out.

The object of the present invention is to provide a reflector of theform of the downwardlyflared upper part of the bulb and adapted to fitrather snugly about such part of the same, said reflector beingsupported wholly on the bulb by the downwardly-flarin g shape of thelatter and having a suitable rel'lectingsurface, such as a silveredsurface, for example.

In the accompanying drawings, which illustrate an embodiment of theinvention, Figure 1 is a side elevation of the lamp, the reflector beingrepresented in vertical mid-section. Fig. 2 is a plan View of thereflector detached.

Fig. 3 is a side elevation of a slightly-mo di-.

fied form of the reflector on a lamp.

A represents an ordinary incandescentbulb, and B the reflector thereon.The ordinary bulbs of these lamps are of substantially the same shape orform and for a given can dle-power also of substantially the same size.Of circular cross-section, they flare downward from the metalsocket-plug a to about the point no, and the part below or beyond thatpoint is nearly hemispherical.

The reflector B is constructed to fit quite snugly over and inclose theupper part of the bulb; but it may be readily lifted off and replaced,the smaller end thereof being of sufficent size to pass over thesocket-plug a. The reflector is supported wholly on the bulb and bycontact with its flared surface. At its lower edge the reflector mayhave a projecting marginal lip 19, and the reflecting-surface may extendout and over this lip.

- Fig. 3 shows the reflector without the lip ,b, but constructedotherwise in a similar manner.

Preferably the reflector B will be of glass, as it will then expand andcontract under differences of temperature to about the same extent asthe bulb; but the invention is not limited in this respect. Othermaterials not liable to injury by heat may be used, as aluminium, forexample. Obviously it should not be unduly heavy.

An advantage of this reflector is that while it is readily removable andmay be taken from a dis-carded bulb and put on a fresh one, thusobviating the loss of a reflector with each bulb, yet it does notrequire (as do most reflectors) some special form of lamp having meansfor securing it to the metal socket or plug, as it drops over and issupported entirely on the bulb itself. This adapts it to any ordinaryincandescent bulb and also enables it to be produced very economically.

- As shown in Fig. 3, the lower edge of the reflector is scalloped andis in a plane at right angles to the axis of the bulb; butthese'features are not essential. The scallops may be omitted and thebottom edge of the reflector be cut obliquely to the bulb-axis.

Having thus described my invention, I claim '1. The combination with thebulb of an incandescent lamp, of a light-reflector, which fits snuglybut removably over the external surface of the'downwardly-fiared upperpart of said bulb and is supported wholly and directly thereon,substantially as and for the purpose set forth.

2. The combination Withthe bulb of an incandescent lamp, of a removablereflector B, inclosing and snugly fitting the external surface of theupper, downwardly-flared portion of the bulb, said reflector beingsupported wholly and directly on the bulb and extending down about tothe point where the bulb an outwardly-turned marginal lip at-its lower10 is largest in diameter, substantially as set edge, substantially asset forth. forth. In witness whereof I have hereunto signed my name,this 9th day of February, 1899, in

a. The combination with the bulb A, of an incandescent lamp, of aremovable, glass rethe presence of two subscribing witnesses. WALTERGOODOIIILD.

flector embracing, and housing the bulb, and supported Wholly on thedownwardly-iiaring \Vitnesses:

HENRY CONNETT.

l upper portion of the same, said reflector fiti PETER A. ROSS, ting theoutersurface of the bulb and having I

